Mechanical razor



June 6, 1939. l

Filed Nov. l, 1958 J. H. RAND, JR., ET AL MECHANICAL RAZOR INVENTO RSJ.H.RAND, JR. A.M. Ross .A TORNEY' Patented June 6, 1939 UNITED STATES iPATENT OFFICE Greenwich, Conn.,

asslgnors to Remington Rand Inc., Buffalo, N. Y., a corporation of Dela-Ware Application November l, 1938, Serial No. 238,126

4 Claims. l(Cl. 30-43) This application relates to mechanical razors andmore particularly to the operation and construction of a shearing headtherefor.

In mechanical razors of the usual type it has been the general practiceto provide a shearing head in which the outer cutter, or shear plate, isheld stationary with respect to the handle, while the inner cutter isoscillated with respect to the outer cutter by some form of driving arm.

I While this type of head has been found satisfactory in use, there isone disadvantage, namely, that the'blades or bars of the outer cutterbend or cover a considerable portion of the hairs in the skin traversed.This necessitates the movement of the razor over the skin a number oftimes to insure that all of the hairs will be cut.

provide a movable outer cutter, which will have a combing or siftingaction, thereby insuring that a major portion of the hair in the skintraversed l by the razor will be picked up and cut.

It is, therefore, the principal object of the in- 25 vention to providea shearing head in which the outer cutter is moved a short distancerelative to the handle, whereby the blades sift and comb the hair intoposition to be cut. l

Anotherobject is to provide an outer cutter -30 which is adapted to begiven a slight longitudinal movement relative to the handle and in thesame direction as the inner cutter.

A still further object is. to provide a resilient cushion, between thedriving means and outer 35 cutter for reducing noise and insuringpositive movement of the cutter.

A more clear conception of the construction,

operation, and further objects of the invention may be had from thefollowing specification when 40 read in conjunction with theaccompanying drawing, in which:

Fig. V1 is a side elevation of a shearing head with a portion brokenaway to disclose the invention;

Fig. 2 is a cross sectional view taken substan- 45 tially along the line2-2 of Fig. 1;

Fig. 3 is a longitudinal section through the To overcome thisdisadvantage it is proposed to any well known plastic material such asbakelite, in which is mounted any suitable mechanism adapted tooscillate a. driving arm I2. It is obvious that the arm I2 may beoscillated by a number of mediums such as-an electric motor, a springmotor, a flexible shaft, or manually operated levers similar to the wellknown type of hair clippers. Positioned in and guided by the outercutter is an inner cutter I4 having a slot I9 in the base thereof withwhich thel driving 10 arm cooperates.

The outer cutter has heretofore been fastened to the handle by a setscrew I5 and was held from longitudinal movement by a. lug I6 on thehandle engaging a slot in the base of the outer cutter. l

In the present invention the same means is provided with the followingdifference, i. e., that the set screw I5 only prevents vertical movementof the outer cutter and the lug I6 n o longer prevents longitudinalmovement, but .is used as a limit stop to permit a slight oscillation ofthe outer cutter. 1 I

Referring to Fig. l, it will be noted that a'slot Il is formed in thebase of the outer cutter I0 and there is positioned in the slot atapered chan- 'nel-shaped block I8 of-resilient material, such as ubberor the like. It is obvious that a piece of spring metal of suitableshape could well be substituted for the rubber. block. 'Y

'Ihe set screw I5 (Fig. 2) is formed with a re- 30 duced tip portion 20which is adapted to enter and cooperate witha longitudinal slot 2|(Fig. 1) cut in the outer cutter I0- The screw I5 is of such a lengththat the tip 20 thereof prevents vertical movementt of the outer cutterbut does not reach the bottom of slot 2l and hence will not bind toprevent longitudinal travel of the cutter. In

\ other words, the reduced tip 20 engages the slot 2l,` and provides atrack for the cutter I0.

Theshearing head in this type of razor is insert- 40 ed in alongitudinal groove 22 in the top of the handle. In the presentembodiment, a cushion 23 .of some easily deformable, yet resilient,material,

such as rubber isypositioned in the bottom of slot 22. This cushionprovides a means whereby any manufacturing errors in the locating of theslot 2| can be corrected to insure the free movement of the end of screw20 in the slot 2|. The deformable property of the rubber insures thatthe cutter will move easily with respectv to the bottom of the groove22. v

The driving arm I2 for the inner cutter extends through a slot `24 inthe base of the outer cutter and in razors heretofore known in the artthis slot was formed suciently long to permit free oscillation of thearm I2. In the present embodiment, however, a'plug 2t of resilientmaterial similar to the block I8 is inserted in an enlarged' portion ofeach end of the slot and is of sufficient size so that the arm I2 willcome in contact therewith just prior to the end.- of the stroke.

Spring-pressed pins 2l are provided in the handle II which extendthrough the base of shear plate I0 and contact the base of inner cutterIII, pressing it into shearing relation with the shear plate.

In assembling, the shearing head is inserted in the groove 22 andpressed down on the cushion 23 until the tip 20 of the screw I5 canenter'the slot 2l. The head is positioned with the lug I6 in theresilient block I8 and arm I2 passes through the slot 2t in the base andengages the slot I9 in the inner cutter Id,

In operation any oscillation of arm I2 will drive the inner cutterlongitudinally. Due to the fric-` tional engagement between the innercutter and the outer cutter, it is caused to move a short distancelongitudinally against the resilient action of the block I8 and thedeformation of cushion 23. As soon as the friction is overcome, theouter cutter is returned toward normal by the resilient action of blockI8 and cushion 23 until just prior to the end of the stroke of arm I2,at which time the outer cutter is again moved longitudinally, due to thecontact of the arm block 2B. The relative amount of movement of theouter and inner cutters is indicated by the dotted lines in Fig. 3.While the movement of the outer cutter, due to the frictional contactbetween the cutters is slight and may vary, the movement, due to the armI2, is always approximately uniform.

From the above operation, it will be apparent that the outer cutter willhave a slight movement relative to the handle which will cause the hairto be sifted or combed in between the blades of the shear plate wherethey will be cut by the inner cutter.

While I have described what I consider to be a highly desirableembodiment of my invention,

itis obvious that many changes in form could be made without departingfrom the spirit of my invention, and I, therefore, do not limit myselfto the exact form herein shown and described, nor to anything less thanthe whole of my invention as hereinbefore set forth, and as hereinafterclaimed.

What I claim as new, and desire to secure by Letters Patent, is:

1. In a mechanical razor, a handle, a shear plate mounted forlongitudinal movement on said handle, an inner cutter cooperating withsaid shear plate, an arm for reciprocating said inner cutter, andresilient means in the base of said shear plate compressed by said armfor reciprocating said plate longitudinally of said handle.

2. In a mechanical razor, a handle, a shear plate mounted forlongitudinal movement on said handle, a resilient mounting for saidshear plate adapted to restrict said longitudinal movement, an innercutter cooperating with said shear plate, an arm for reciprocating saidinner cutter, and `resilient means in the base of said shear platecompressed by said arm for reciprocating said shear plate longitudinallyof said handle.

3. In a mechanical razor, a handle, a shearing head mounted on saidhandle, said shearing head comprising a shear plate and inner cuttereach adapted to reciprocate longitudinally with respect to each otherand said handle, a lug on said handle, a slot inthe base of said shearplate, and a resilient cushion in said slot engaging said lug to limitthe longitudinal movement of said plate with respect to said handle.

4. In a mechanical razor, a handle, a detachable shearing headcomprising inner and outer cutter members mounted for longitudinalreciprocation with respect to each other and said handle, a longitudinalslot in the base of said outer cutter, a shouldered screw in said handleadapted to engage said slot to permit longitudinal movement of saidouter cutter, said screw preventing detachment of said outer cutter fromsaid handle, a lug on said handle, a second slot in the base of saidouter cutter, and a resilient cushion in said slot engaging said lug topermit limited longitudinal movement of said outer cutter with respectto said handle.

JAMES H. RAND, JR. ALBERT M. ROSS.

